Japan backs BOJ rate hike as September odds hit 74%

Prime Minister Sanae Takaichi's government supports a near-term Bank of Japan rate hike, with September or October the leading candidates, according to people familiar with the matter — a stance that pushed the yen to 159.18 per dollar.

"We believe specific monetary policy measures, including interest rate hikes, should be left to the Bank of Japan," the prime minister's office said in an emailed statement. The central bank should work closely with the government to achieve the 2 percent inflation target in a "stable manner," it added. The BOJ declined to comment.

The yen strengthened to 159.18 against the dollar from about 159.46 following the report, while yields on benchmark 10-year government bonds edged higher. The BOJ held its policy rate at 1 percent on July 31, when Governor Kazuo Ueda signaled the pace of future increases could accelerate, citing upside risks to prices. Traders now price a 74 percent probability of a hike at the Sept. 18 meeting.

A third increase would mark the fastest pace of monetary tightening in a 12-month span since 1989, when Japan's asset bubble peaked. It would also reinforce the first joint US-Japan yen-buying intervention since 1998, which faded quickly after being executed late last month.

Yen Weakness Drives Policy Alignment

The BOJ's concern that yen weakness is lifting import prices and adding to inflationary pressure has converged with the government's desire to strengthen the impact of the recent US-Japan currency intervention. The wide gap between US and Japanese interest rates remains one of the primary factors fueling the yen's decline, which has fed into a cost-of-living crunch that voters want Takaichi to address.

The government had conveyed support before the July 31 meeting for Ueda to strike a hawkish tone at his press conference, according to one of the people. Growth Strategy Minister Minoru Kiuchi told Bloomberg Television on Monday that "we respect the bank's independence," a possible sign officials are open to more tightening.

Takaichi has long been considered wary of taking interest rates too high, too fast and snuffing out an economic rebound that has excited investors worldwide. Yet the political calculus appears to have shifted: the yen's slide has become a voter concern, and the government's recent sales tax cut approval suggests it is willing to pair fiscal stimulus with monetary tightening to manage the trade-off.

Market Pricing and Historical Precedent

Central bank officials still want to assess economic and price developments before making a final decision on timing, but they haven't ruled out a September move, the people said. In the bank's summary of opinions from its July meeting, one board member stated that given underlying CPI inflation approaching 2 percent, "it could be considered that the pace of policy interest rate hikes will be faster than market expectations."

The last time Japan tightened at this pace was 1989, when the central bank raised rates three times in 12 months at the height of the country's asset bubble. The BOJ has already moved twice since Takaichi took office last October, although its benchmark rate remains low at 1 percent.

US Treasury Secretary Scott Bessent has signaled he believes further yen support is necessary, and Goldman Sachs estimates Japan's roughly $1 trillion of foreign reserves leaves ample capacity for additional interventions if needed. The 2013 joint accord between the government and central bank commits both sides to work together on strengthening growth, with the BOJ's 2 percent inflation goal as the anchor.

If the BOJ raises rates in September or October, it would mark the third increase since Takaichi took office. The transmission chain is clear: a hike would narrow the US-Japan rate differential, support the yen, and ease import-driven inflation — but it also risks slowing the economic rebound that has drawn global investor attention to Japanese equities.

This article is for informational purposes only and does not constitute investment advice.